Task 157 : Add a skype button
Merge branch 'upstream/develop'
Merge branch 'upstream/develop'
Merge branch 'upstream/develop'
Merge branch 'origin/develop'
Fix: Info tab was wrong with interventions
Merge pull request #1281 from grandoc/develop

missing trad
Merge pull request #1279 from aspangaro/skype

Task 157 : add a Skype button
Fix error reported by travis.